diff --git a/doc/grammars/phpdoc-block.pp3 b/doc/grammars/phpdoc-block.pp3
index 9a654614..bbb74384 100644
--- a/doc/grammars/phpdoc-block.pp3
+++ b/doc/grammars/phpdoc-block.pp3
@@ -592,8 +592,17 @@ DoctrineArgumentList
   : DoctrineArgument() Eols() ( <T_COMMA> Eols() ( &<T_CLOSE_PARENTHESES> | DoctrineArgument() Eols() ) )*
   ;
 
+/**
+ * An argument of an annotation, like:
+ *  - bar="baz"
+ *  - "bar"="baz"
+ *
+ *  Doctrine reads only a name before the "=", but a key written in quotes is
+ *  read too, as the name of the argument.
+ */
 DoctrineArgument
   : Identifier() Eols() <T_EQUAL> Eols() DoctrineValue()
+  | DoctrineString() Eols() <T_EQUAL> Eols() DoctrineValue()
   | DoctrineValue()
   ;
 
diff --git a/src/Parser/PhpDocParser.php b/src/Parser/PhpDocParser.php
index 29fb4be9..581a8b1e 100644
--- a/src/Parser/PhpDocParser.php
+++ b/src/Parser/PhpDocParser.php
@@ -587,7 +587,8 @@ private function parseDoctrineArguments(TokenIterator $tokens, bool $deep): arra
 
 	private function parseDoctrineArgument(TokenIterator $tokens): Doctrine\DoctrineArgument
 	{
-		if (!$tokens->isCurrentTokenType(Lexer::TOKEN_IDENTIFIER)) {
+		// a quoted key, e.g. "key"="value", is not valid Doctrine syntax, but is accepted as the key
+		if (!$tokens->isCurrentTokenType(Lexer::TOKEN_IDENTIFIER, Lexer::TOKEN_DOUBLE_QUOTED_STRING, Lexer::TOKEN_DOCTRINE_ANNOTATION_STRING)) {
 			$startLine = $tokens->currentTokenLine();
 			$startIndex = $tokens->currentTokenIndex();
 
@@ -604,8 +605,12 @@ private function parseDoctrineArgument(TokenIterator $tokens): Doctrine\Doctrine
 
 		try {
 			$tokens->pushSavePoint();
+			$isIdentifier = $tokens->isCurrentTokenType(Lexer::TOKEN_IDENTIFIER);
 			$currentValue = $tokens->currentTokenValue();
-			$tokens->consumeTokenType(Lexer::TOKEN_IDENTIFIER);
+			$tokens->next();
+			if (!$isIdentifier) {
+				$currentValue = $this->doctrineConstantExprParser->parseDoctrineString($currentValue, $tokens)->value;
+			}
 
 			$key = $this->enrichWithAttributes(
 				$tokens,
diff --git a/tests/PHPStan/Parser/PhpDocParserTest.php b/tests/PHPStan/Parser/PhpDocParserTest.php
index 95d045c5..b9b59ba6 100644
--- a/tests/PHPStan/Parser/PhpDocParserTest.php
+++ b/tests/PHPStan/Parser/PhpDocParserTest.php
@@ -7523,6 +7523,34 @@ public function provideDoctrineWithoutDoctrineCheckData(): Iterator
 				new PhpDocTagNode('@package', new GenericTagValueNode('foo')),
 			]),
 		];
+		yield [
+			'Quoted argument key',
+			'/** @DummyAnnotation(targetEntity=Training::class, "indexBy" = "id", "a""b"="c") */',
+			new PhpDocNode([
+				new PhpDocTagNode('@DummyAnnotation', new DoctrineTagValueNode(
+					new DoctrineAnnotation('@DummyAnnotation', [
+						new DoctrineArgument(new IdentifierTypeNode('targetEntity'), new ConstFetchNode('Training', 'class')),
+						new DoctrineArgument(new IdentifierTypeNode('indexBy'), new DoctrineConstExprStringNode('id')),
+						new DoctrineArgument(new IdentifierTypeNode('a"b'), new DoctrineConstExprStringNode('c')),
+					]),
+					'',
+				)),
+			]),
+		];
+
+		yield [
+			'Quoted positional argument',
+			'/** @DummyAnnotation("foo", "bar") */',
+			new PhpDocNode([
+				new PhpDocTagNode('@DummyAnnotation', new DoctrineTagValueNode(
+					new DoctrineAnnotation('@DummyAnnotation', [
+						new DoctrineArgument(null, new DoctrineConstExprStringNode('foo')),
+						new DoctrineArgument(null, new DoctrineConstExprStringNode('bar')),
+					]),
+					'',
+				)),
+			]),
+		];
 	}
 
 	public function provideSpecializedTags(): Iterator
diff --git a/tests/PHPStan/Printer/PrinterTest.php b/tests/PHPStan/Printer/PrinterTest.php
index 5261f5ab..4288e1bc 100644
--- a/tests/PHPStan/Printer/PrinterTest.php
+++ b/tests/PHPStan/Printer/PrinterTest.php
@@ -10,6 +10,7 @@
 use PHPStan\PhpDocParser\Ast\ConstExpr\ConstExprIntegerNode;
 use PHPStan\PhpDocParser\Ast\ConstExpr\ConstExprStringNode;
 use PHPStan\PhpDocParser\Ast\ConstExpr\ConstFetchNode;
+use PHPStan\PhpDocParser\Ast\ConstExpr\DoctrineConstExprStringNode;
 use PHPStan\PhpDocParser\Ast\Node;
 use PHPStan\PhpDocParser\Ast\NodeTraverser;
 use PHPStan\PhpDocParser\Ast\NodeVisitor;
@@ -2231,6 +2232,23 @@ public function enterNode(Node $node)
 			},
 		];
 
+		yield [
+			'/** @Foo("indexBy" = "id", "name"="foo") */',
+			'/** @Foo("indexBy" = "id", "name"="bar") */',
+			new class extends AbstractNodeVisitor {
+
+				public function enterNode(Node $node)
+				{
+					if ($node instanceof DoctrineArgument && $node->key !== null && $node->key->name === 'name') {
+						$node->value = new DoctrineConstExprStringNode('bar');
+					}
+
+					return $node;
+				}
+
+			},
+		];
+
 		yield [
 			'/** @Foo() */',
 			'/** @Bar() */',